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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5cf182b05d35d45323c7f85bafcba39b736e6c4d06255ae2afce7ce586a8b74f' 
  AND token = 'j1F8PxZvX1qCieWMCgb49MU6ck1IO1tp0iVwhta8ulQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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