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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ddc3c290038dd5e628df3cd2b4485ea03a13a864033fdc472b5ff645a956107e' 
  AND token = 'xiUpCTX2TFmn4Vd2jXt/xBCuy/Mmdw6190q5WO8sQYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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