SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '4e6b8bbc9874f80f0362a45860caafb54486262dfaeba22af7725e2a90cbe633' 
  AND token = 'zj3cfd85XB/BhjYiLcKEyHHzgf+/gdPRJnKn/dAbvUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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