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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e439f4fcb68261cb78c305646b41dce0cebf318fdb529510f5024cf314b408d6' 
  AND token = 'ZDz4tgaGcPmMrlH8ghh/TLaET1cT61NZ/hQvGiBCG3U=' 
  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"
    }
  }
}