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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '24cea9afbe7a4ca546d2cb1f89df6f41431cfce1e9563459e26bc3cbac356d1e' 
  AND token = 'IqSMi6eoSPEnFgMXfU4hbJGLCqnQ05YAluQV4Xl7cVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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