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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0f1164ac11b97b843ea8601379d3a65175bdf03f11057fa3f921f42e38597e16' 
  AND token = 'LTTRgU9Q+PvxlAExfM3dIjF2ksXVwmGf4A17tXTpjro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00283

JSON explain

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