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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '94955df8e80db8d3b0c2b2382310fcd09a7bdd16c4176ecd8336bbac6b552e4a' 
  AND token = 'j1F2FBTjulxHueNFIC41YT3CqPuLlpYg7q3oDHs5Roc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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