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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '414d65ffc8e9e4f49d4b70e2f64cb3045ffd70164cdafb6d93439550bf13ae05' 
  AND token = '+5/ok7g0W11jpoNNVLHhSe98USKqlkuH4L1PhAlBpKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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