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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72182bb5891fb13f00ef9204d8ebac7ee888b787c3987702eb1903c06332e8d2' 
  AND token = '07QfPw/kkERfC2dn4v5t9kcykXFsIjgyTHybsS6IaY8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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