SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fc3bbc2c622bb9784e4b7c96de00b9a446e92ce70567096d373eea91efae5511' 
  AND token = 'eiWCZYNLT9/UWh7Ah+gnFTrgoSjaQ1KvNC+z5D3HdCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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