Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebeedfd5826484daceabebfcb1030d955d080986f456d9b713c284f3336049f8' 
  AND token = 'ImSOHqOQBOm7n7ES0zjaCT1vb6kujPVfBy5GChftB3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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