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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdd11e7ab48ec108dcaa59b27cc45011b40c7ce447c1ac1ca547a49c31489207' 
  AND token = 'v/Tq+4zJdfxfzWaW+7dzPaF5Kr3akA10TMG9Yfu6Yts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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