Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed952c32abede534c4937013ca1609668cacc74084097d8b4b3082a296903fdc' 
  AND token = 'EN7vLzTjGsZvjn4SGF4VM0nfUImITGGyC68z2P5UsXM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}