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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '762d63a0ae8773f3265b3a9b73c0c8e601246b172fa062b6fc72fd4e09f0f505' 
  AND token = 'nIenkINgNPdKGPWIL9Cca8BbkbJU0MCiwSY7ALHijUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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