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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9d985e130a82bc763cd58eaf88c1912944f52e8abda2c3966a81c6173d1e5b74' 
  AND token = 't0+GOAHYeQs5boiiuiYojlUiF2O4YLZkYOHk0EWpoCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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