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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2baa33f792de8824fb55f1c2a3005e60e23f8de6863f869be449c70ef83ef1da' 
  AND token = 'cz5WVSBoNN4/fpFKGJY7LMMJBB/t5AyUJSp3OK9Azjc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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