Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b6303e763fa0dbebddd9096d7ce749cfdbb088460231c1e6f8b55f0a32684e9b' 
  AND token = 'psQyyMaDHP8Cd+tCc5TlrXiGvy0u55n3GtFhQvlTRqQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}