Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c9a369b74a9de0f616c5e1684af0d0e9f3b6d053311ab15c34eeb7b27686ab7' 
  AND token = 'CkaMXSeEXXZzjggjl5ThzMLMx3ENeMK0l0Im3Z2YM94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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