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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f964b80c5c58d55bc42ccaa7b3e27ea3f2d7dbada812662218aac47e9c4232ee' 
  AND token = '2NYS67MzI5fgzzSI/jDdaM6/YgwUP+B7ZB8wn+ffij4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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