Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2602df5c8f149d40015e9055e61e8da3e8ad1d62968f98da025483fbbcb687a8' 
  AND token = '/CSf1Qjmk1CgilC6q4brqapXwhrqvm9/ndQyNGG7ns0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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