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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fa13ee819f12a9e9c582d12d2f1ff6e64f35ca3c6922e69f480bf004990ec71' 
  AND token = 'Ki0X9w9n7kI1euPb5WlDAW3M8ue8OzJf07EvS3YhGSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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