Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6736bf0c1616445e0d6f14ecdbb5d09ee4f7d26c944754fa452b8de3f5291f4' 
  AND token = 'x9yG6z6WODLd6hP2XZUCsnGAigJX4qWgSuP1gJotVMk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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