SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0545eb72e47a8f35d6177a6fc9a589f680d540372f63c6a04183e5d265240886' 
  AND token = 'qGMBJ+w3ZWVLUppEtHvb1/cYf5aiHPgCiF/ApguOXWc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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