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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bedcc8053f697511f6eb221f8bb4021f6a7f1b1de0ea01bd12036f10ba51f9ce' 
  AND token = 'EVq4Jsrc8Fk04Ys8IAkepJ7r5y4BnBusRytkG+TayGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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