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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '63c1356eb24ea3d8fda4e9071ce00f2b49ea3f670cdb055cb5f7151c960306d9' 
  AND token = 'boPN/NC8FXoXkIzBiMOSe63GmZDc05SK7f5b4cZsKc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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