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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bb16b7bc334e820a8ed4875c3094cbdc9078bb0001bfc9ec20de90fe3909badf' 
  AND token = 'GH2ywnIESfvMBaVxGOmf5urvEiadX0r3zOY5RyCEkqU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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