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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '380c089f58764e1d996a8e4970729ec4f8157b7ff7cff2bcfe3632d6fe6a860a' 
  AND token = '55U85G+LnAjU9wP7FBJkCd0qBEQXyBjpEaH02fYp0IE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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