Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c851b775c06a94eff7b8c5d4caac26de2909897207fc7a0a1f85d2a859b21f9' 
  AND token = 'NXjRfvq9aHg11YE63HMKTzSnGCv3z6BZT4Q94ZpZHQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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