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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '7f8b59ceb066a5d1a60f7a4b06714855381d884c83407a107516bd43f9d8b2a2' 
  AND token = 'KP4dipvxXGeymFekCnxUMd7/nBU9QVKreV02Eg9OsOU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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