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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '316916e336326ab65db705d311e5e58903e07fde9bf8c6cbe19501485728988c' 
  AND token = 'jh8c8RxkEdD97oeDM2dRUjZDPmDNUHRfL8mgtElKtR0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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