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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9da55aee09f36458d7277a2a8a528c841ff0cf67595cbdab961621d789d6636d' 
  AND token = 'GnruT5Rj9ITo2xP14I9a7/g7MTnNPKhOt8gxVf21OzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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