Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e02e99d3dbb41273e412456312fc7cdf2bf131d9a2ddaa8d8e0585d2113bf8e4' 
  AND token = '5PDDyPsKCenM53HDmID3n55bSwYqcNvtbntMJvm0tI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}