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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ce6df0f0200d6657594837f217ea2b349a76f8528a85db24a7d5cebdf0a8d9e7' 
  AND token = '60+Vu4VFgVXtx11L66yN+wh994qtHg+KrArujiuNFLk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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