Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea9ede5429f0c17bc81d1bf690d0f01f76b799639d66fb0983cd5618c2faf5fd' 
  AND token = 'PguPvvKMkvh1vIuxolPcklGHgP8NYNj+OOBnCb8L4XE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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