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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '270b669f418751264826d29fab6c401a9c7d356d9ca0ff15e461714b51d8e0ae' 
  AND token = 'ro72ZLPyHikp1IPU73ELXKBUBZLFToeXcGWP6R5W6rs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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