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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5e951f8f23d4418bf366eb7719f663dcccf34e47bc3facd34964033a07c7872e' 
  AND token = 'Z4mn6U0jZ1tqlThhcf1CQtNFhdLrLxX4I6KKjZ0PD14=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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