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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ba6ca8934f42d83ee5a7414ad55563e213d3511a85277a783c8c2207e2a1d11f' 
  AND token = 'gevD2ykvTB4DOS8Rs5yFs2OAx455l3frpCQwcq7CSDk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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