Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ab834a5fc66078829d32b34e6be6c6cf96ea87b2051a7f835a79492ed36cd965' 
  AND token = 'ggJn7MqDctLaYuaM0n/+ADi+Fy364GLCAIaYGExp2jM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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