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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0332a4a601f6acea21adfb253df64ff088c115ce83f5858f3ac97c31b1f392b2' 
  AND token = 'Q3BevAioV2unMd/XXlTxbYDAh7hLXe1GARd7e9/aqpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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