Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '689a7c073567cd408f034af09efec4006b03873dadbd0e3d1acbe75928c2642b' 
  AND token = 'vF8u5F6Qfpv5vxqEMBKGeIKPGeePPZXMvFM2Lj1Yvmg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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