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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '23e8cb7b2d0142629421b4177bd22bee2f497f3e74b10424ee97a23632e87baa' 
  AND token = 'Q64c2HcvhYlR6fKmszg7tE1trJjkE/A62UkIDd7XTak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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