Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a881e68eaac825000d662016a6790597b73425079bfa1999aa08c776a2f4af6' 
  AND token = 'K4/tK9QLyjnPAtoAHVYNSdGFHa+spTymvsXkgmVJ++0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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