Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fbd35648845cadba953440ca71604e6fac4b91cd655a8bd26bd481f8c910e3e' 
  AND token = 'fd4HoPLGBU2CbcLeQjzq5yOhulBCOB1d7YykxXSsZKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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