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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22eacbd3c7be966d366fb9d7d6fa3f0635a4e69a942859655b81d235524df1a6' 
  AND token = 'Osq2CQxww2Q+O29qxdRP1O12KB/55IK2YTZniNeQ6gw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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