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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '244f59a6c3a0f863bda1f2b62f0a342a0afd21e1248ad3588467c66efc7a366e' 
  AND token = 'BB+ZkJs4ChwBtRrwGjQ8L55C8b39jZ0C8+H8x/1tE84=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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