Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd61a113377aebcd8deddd31c950be2b6390b6ba4054aba4179b8a1480ca01f12' 
  AND token = 'rR/ODWV+qkHVrAWyOEpD04TtvyJr94PU2wp7zEFN8rA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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