Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a146a83acb17bbadc7f11d8a3a33e70334efa85dcdf2b0c25a249a211525c1cd' 
  AND token = '3kAmGX1t65jMVO/MuYwuejBNBPSegZlxPlSpH8m9T+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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