Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89646dffc1d3c6c0af0b8667ecd5025a37136e3e2a9c2d25a9bb79f3d5a42ec5' 
  AND token = 'M5U8jpkkvPiwoW5PRe55xL8pmkANz/xaR53MM/I/RvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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