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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91ed05ef4b86693f9107a5b5ae1c8b3193e80bb01cde9e065b0e96e4b93bf4cb' 
  AND token = '8mx3X++HIIjiYPLky0Lv6Qy9MKjPBhiyKMWVeuAYDSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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