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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '31649b202790803732271a75665503f23a3468c8a69daee33e8c626c91d03e60' 
  AND token = '4bl/P6nJdCipXgtf3N79fMwst0Wn7v6PeXtQyjZR6n8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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