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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '06ce384333c83443866c40b4629a040f4f6239cf97442c0fe26a16f04f25e2ec' 
  AND token = 'xvFTzIfk9sf55fo/QLv1Iz5IHCZOPhSjJx5OrLAhnsI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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