Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd3d3302f41d294f3432675c9d52227947730b1a2be846773e3021080c3bf12b' 
  AND token = 'Nouh0Yk7kiiawSPalrE+jBpr2GgktNdaRjhhYwzUL4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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