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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3030c7e2a1864f2934531e13a3679f2098ae864e69de01bef3a099f4a8b1302c' 
  AND token = 'VUFf9cDmlZviBFOUvQAaMMGIQx7TXMpJF8TF2yqDqgk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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