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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1378e0e2b43d594a7c4ebf0da3af5e31058f378153a2b887f1b219279ccf0b30' 
  AND token = 'CkP9LrdgQiEASrdxkqPFJsFA4t8EVtNfwggYWOeeWbg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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