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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b0fba4dfcf8994fd3cd6299d46a9af342c19211ed82ce004f1997d0f4a3cdb6f' 
  AND token = 'bt96O4bye6aHv5yI4M3FWJeYd6nj31hFRPFffuGPodw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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