Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0753b258cfa5f3e1ae85d40023f958ebdf90623b76d10565bb75dc6e3866827' 
  AND token = '+3Eji10RyBXDkeUicYaVVz3rTMRq0g2n2Z+Ur48gy1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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