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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '007ca3c157ea4a7b87e2063a4c6b25ff23658486cb85b05d3e1901242a00df24' 
  AND token = '14XpzWAbItgzpJtJkbhGMrB5N3GcLIy1YT1t9Wljg0U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00091

JSON explain

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