SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f6efefb3a2659907c420d4874afc1d47dbd3dccfe6d32f775ba35898c5c2fc00' 
  AND token = 'NKlpu46EbXhhgxXLV8peTFfn/KOFMDnZE6qpz3S0ygw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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