SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '428d9c65cde9f6bdd5438e6e88e75fedad45e85270434538d0c66abf92f64908' 
  AND token = 'jjzQPhDV11D4J7k4pEEeX37kFBC+BgrfDRTY+oiZnAc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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