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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9632e4c57c5d9aa1e6ce31f876d77d140d2f46870c6222621030c81ee8c3df2f' 
  AND token = '+5A5HnePx6mxkiwQIBHbYRl0DQ82CfAlt8YWO9c+2Yk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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