Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4821be8ae89b8376705dc0530d4d0e6254c1dfb74ab35d01fce865cc7767deac' 
  AND token = 'Udl883e+qSERc7HeOeS+lmIaVtFZdPATN4jnqmzoxeQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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