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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '2fe12602eefb62d88d839720ba1f3c12b546700d4662a4b168776640ce697ed9' 
  AND token = 'Ev0jTRNjnmV00FKmgM+S1a3nmQEQH30fViAo1bFrJg4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}