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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b7424235e9930ff59f4358e1833f5f0f872b24e09274a2b52650b19f4b69323f' 
  AND token = 'GH2hsINKEBHrQHno1QSiQoLpgw5hG84g1yGbIaHPK8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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