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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11f19912b8849d8e114c3a5ca898eb57932bc5873a3faa6f5c4463ebcc8b0f93' 
  AND token = 'U8bLDOHuEG26eP1p+NFs2OOHCQJzmV1TxGbd0q0mKls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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