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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1c20541bf209432a4aef3e635dc8d053aa208c61e2a397681b81a2804c155db' 
  AND token = '6HRJVkWSOBbj1HHQ3a9xx9fYmlcgiUI2Wbnr2iwXTVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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