Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '437ae688531c9043962e822fe6babaccecb6be67f5d4940b8475a35717607e06' 
  AND token = 'g1al4zD6ZUzl5RvvBOwM5Kb8rKyTevvq6gMHxX9Ewzw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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