Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '81eac95e15cf466f89c4c1c85c7851c6b3f8b13eff773dbb3a540e0a45f27fd8' 
  AND token = '/VwDCHHeDrlu7zsP/NBkHVaX4kF1UmoW68mpLMiuX4M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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