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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf1b43c7656f9800efe69cb31eebee0c0dba1d93a441fb0dc8a508d03b566aa6' 
  AND token = 'GhjBwjocYJ1QxzIL/zGp4AOtPFALwsLG4ymZfcph6p8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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