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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4bedd2d7b1f58092b40badd31e0e6d0428cba045697053c225e821425ea51d33' 
  AND token = 'qkgIYNnsFZbx5yNw2NCEHGntt4a6QNjatBvRZjV+cfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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