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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a197e8c6d9447496e7076bad878b51d86529bf02dad864f6a073fe193dd926bd' 
  AND token = 'AyZIioFUI1Y/HWROLHg34kfszr5a3uhB3W1nC5f14wM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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