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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'a166394b0e5ae9f14c5818e46561b62a62a018708263761335fe9bbb6f738602' 
  AND token = 'bCKtGmbppZJ3BCA21yKR8nlFUYlM9r5glRZFqNUmCSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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