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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '841c9d09daf4a841df373dd78d72d6505c304366d2a0624ac2f3a7bd42c75a95' 
  AND token = '8owxCMqtNlrV53zSK7Vgg6YLuOQUPBE4tyxoiwgp4yo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}