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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e69911ddae98407515dab1f7d110153fb445588ea43e3a14235b7b9a27f6b489' 
  AND token = 'U8bAnVftpDOZwU9i86qqXZmdlAc4SdD3LqQFsQI8ckQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}