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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '290d807c7f0bfe514d756ab474185bbb08fa2bb930e3fce416874639b04dced3' 
  AND token = 'AythMYbTHn47g4dFu1dRjppub1pBvm7BhCtEzbXj0rY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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